math.randomseed(os.time())
math.random()

tblHeight = 8
step = 1
maxWidth = 80
strLen = 2

symPairs = {}

for i = 1, tblHeight do
	symPairs[i] = {}
	for j = 1, 2 do
		local str = ''
		for k = 1, strLen do
			str = str..string.char(math.random(0x61, 0x7A))
		end
		symPairs[i][j] = str
	end
end

for i = 1, tblHeight do
	local line = ''
	local half = math.floor(maxWidth / 2) - strLen
	line = line..string.rep(' ', half - step * i - 1)
	line = line..symPairs[i][1]
	line = line..string.rep(' ', step * i)
	line = line..i
	line = line..string.rep(' ', step * i)
	line = line..symPairs[i][2]
	print(line..'\n')
end
io.read()